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Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance

In this research, a solid acid catalyst was synthesized to catalyse glycerol acetylation into acetins. The sulphated-titania catalysts were prepared via the wet impregnation method at different sulfuric acid concentrations (5%, 10%, 15%, and 20%) and denoted as 5SA, 10SA, 15SA, and 20SA, respectivel...

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Main Authors: Mohamad Rasid, Shera Farisya, Ramli, Irmawati, Ishak, Nor Shafizah, Yap, Taufiq Yun Hin, Muhamad, Ernee Noryana, Lee, Siew Ling, Salamun, Nurrulhidayah
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Published: Multidisciplinary Digital Publishing Institute 2021
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spelling oai:psasir.upm.edu.my:96096 http://psasir.upm.edu.my/id/eprint/96096/ Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance Mohamad Rasid, Shera Farisya Ramli, Irmawati Ishak, Nor Shafizah Yap, Taufiq Yun Hin Muhamad, Ernee Noryana Lee, Siew Ling Salamun, Nurrulhidayah In this research, a solid acid catalyst was synthesized to catalyse glycerol acetylation into acetins. The sulphated-titania catalysts were prepared via the wet impregnation method at different sulfuric acid concentrations (5%, 10%, 15%, and 20%) and denoted as 5SA, 10SA, 15SA, and 20SA, respectively. The synthesized catalysts were characterized using FTIR, XRD, TGA, BET, NH3-TPD, XRF, and SEM-EDX. The synthesized catalysts were tested on glycerol acetylation reaction at conditions: 0.5 g catalyst loading, 100–120 °C temperature, 1:6 glycerol/acetic acid molar ratios, and 2–4 h reaction time. The final product obtained was analysed using GC-FID. An increment in sulfuric acid concentration reduces the surface area, pore volume, and particles size. However, the increment has increased the number of active sites (Lewis acid) and strong acid strength. 15SA catalyst exhibited excellent glycerol conversion (>90%) and the highest selectivity of triacetin (42%). Besides sufficient surface area (1.9 m2 g−1) and good porosity structure, the great performance of the 15SA catalyst was attributed to its high acid site density (342.6 µmol g−1) and the high active site of metal oxide (95%). Multidisciplinary Digital Publishing Institute 2021 Article PeerReviewed Mohamad Rasid, Shera Farisya and Ramli, Irmawati and Ishak, Nor Shafizah and Yap, Taufiq Yun Hin and Muhamad, Ernee Noryana and Lee, Siew Ling and Salamun, Nurrulhidayah (2021) Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance. Catalysts, 11 (12). art. no. 1542. pp. 1-18. ISSN 2073-4344 https://www.mdpi.com/2073-4344/11/12/1542 10.3390/catal11121542
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collection UPM IR
description In this research, a solid acid catalyst was synthesized to catalyse glycerol acetylation into acetins. The sulphated-titania catalysts were prepared via the wet impregnation method at different sulfuric acid concentrations (5%, 10%, 15%, and 20%) and denoted as 5SA, 10SA, 15SA, and 20SA, respectively. The synthesized catalysts were characterized using FTIR, XRD, TGA, BET, NH3-TPD, XRF, and SEM-EDX. The synthesized catalysts were tested on glycerol acetylation reaction at conditions: 0.5 g catalyst loading, 100–120 °C temperature, 1:6 glycerol/acetic acid molar ratios, and 2–4 h reaction time. The final product obtained was analysed using GC-FID. An increment in sulfuric acid concentration reduces the surface area, pore volume, and particles size. However, the increment has increased the number of active sites (Lewis acid) and strong acid strength. 15SA catalyst exhibited excellent glycerol conversion (>90%) and the highest selectivity of triacetin (42%). Besides sufficient surface area (1.9 m2 g−1) and good porosity structure, the great performance of the 15SA catalyst was attributed to its high acid site density (342.6 µmol g−1) and the high active site of metal oxide (95%).
format Article
author Mohamad Rasid, Shera Farisya
Ramli, Irmawati
Ishak, Nor Shafizah
Yap, Taufiq Yun Hin
Muhamad, Ernee Noryana
Lee, Siew Ling
Salamun, Nurrulhidayah
spellingShingle Mohamad Rasid, Shera Farisya
Ramli, Irmawati
Ishak, Nor Shafizah
Yap, Taufiq Yun Hin
Muhamad, Ernee Noryana
Lee, Siew Ling
Salamun, Nurrulhidayah
Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
author_facet Mohamad Rasid, Shera Farisya
Ramli, Irmawati
Ishak, Nor Shafizah
Yap, Taufiq Yun Hin
Muhamad, Ernee Noryana
Lee, Siew Ling
Salamun, Nurrulhidayah
author_sort Mohamad Rasid, Shera Farisya
title Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
title_short Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
title_full Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
title_fullStr Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
title_full_unstemmed Assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
title_sort assessment on the effect of sulfuric acid concentration on physicochemical properties of sulfated-titania catalyst and glycerol acetylation performance
publisher Multidisciplinary Digital Publishing Institute
publishDate 2021
_version_ 1819300828965502976
score 13.4562235

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